There is a pretty good general write up here:
http://www.icbm.org/erkson/ttt/engine/fuel_injection/d-jet.html

I use a Dremel moto-tool with a mandrel and #409 cutoff disks to remove
the metal ferrule holding the hose onto the injector.

If I were you I would replace all the hoses there because they are probably
also old and the amount of gas you can leak there is a lot more than it
takes to destroy your car, especially the expensive FI components.

Get good quality hose clamps. The cheapest ones extrude rubber through
the slots in the clamp and damage the hose when they are really tight.
This is a place where you don't want a damaged hose!
--
George Downs, The "original" Walrus3, Bartlesville, Oklahoma